The metadata below describe the original scanning. Follow the "All Files: HTTP" link in the "View the book" box to the left to find XML files that contain more metadata about the original images and the derived formats (OCR results, PDF etc.). See also the What is the directory structure for the texts? FAQ for information about file content and naming conventions.
"List of the most important inventions and new constructions made at Jena": p. 141
"Chronological list of social and benevolent provisions made by the firm of Carl Zeiss": p. 143-146